What chronology does Paul give for receiving his gospel and meeting Peter?

Paul addresses the churches of Galatia as an apostle whose calling is neither of men nor by man, but by Jesus Christ and God the Father, who raised Christ from the dead. All the brethren with him join the address. He wishes the churches grace and peace from the Father and Jesus Christ, who gave himself for their sins to deliver them from the present wicked world according to the Father’s will. Glory belongs to God for ever.

Paul wonders that they are so soon removed from the one who called them into Christ’s grace toward another gospel. He immediately says that it is not another: some trouble them and would pervert Christ’s gospel. Even if he and his companions or an angel from heaven preach besides what they have preached, let that preacher be anathema. He repeats the warning for anyone preaching besides what they received. He asks whether he persuades men or God, and whether he seeks to please men; if he still pleased men, he would not be Christ’s servant.

The gospel he preached is not according to man. He neither received nor learned it from man, but through the revelation of Jesus Christ. The readers have heard of his former conduct in the Jews’ religion: he persecuted and wasted God’s church beyond measure, advancing above many contemporaries of his nation through abundant zeal for his fathers’ traditions.

God, who separated him from his mother’s womb and called him by grace, was pleased to reveal his Son in him so that he might preach among the Gentiles. Paul immediately did not condescend to flesh and blood. He did not go to Jerusalem to the apostles before him, but went into Arabia and returned to Damascus. After three years he went to Jerusalem to see Peter and stayed with him fifteen days. He saw no other apostle except James, the Lord’s brother, and affirms before God that he is not lying about what he writes.

Afterwards he came into Syria and Cilicia. The churches of Judea in Christ did not know him by face. They had heard only that their former persecutor now preached the faith he once impugned, and they glorified God in him. The chapter does not specify the duration or activities of the Arabian stay, or identify the troubling teachers’ particular demands.